It was discovered on 4 February 1989 by Belgian astronomer Eric Elst at ESO's La Silla Observatory in Chile.
It is located in the leading Greek camp at the Gas Giant's L4 Lagrangian point, 60° ahead of its orbit (see Trojans in astronomy).
[8] In March 2013, a rotational lightcurve of Eurypylos was obtained from photometric observations by Robert Stephens at the Center for Solar System Studies in Landers, California.
[7][8][a] According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Eurypylos measures 45.52 kilometers in diameter and its surface has an albedo of 0.065,[6] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 46.30 kilometers based on an absolute magnitude of 10.4.
This minor planet was named from Greek mythology after the legendary king Eurypylus, the leader of the Thessalian contingent, who brought 40 ships to the siege of Troy.